So sorry to ask this question again and again, but it really bothers me
very much.
Now I debugged into hpcInit.c and open(devcie)  returned successfully,
where the device is /dev/ttyE0
But the call to OpenFrameBuffer() failed. It failed at
    int mode = WSDISPLAYIO_MODE_MAPPED;
    ioctl(fd, WSDISPLAYIO_SMODE, &mode) returned -1;
I think this call had not stepped into my LCD driver because my lcd_ioctl
only returns EPASSTHROUGH(-4) instead of -1.
It looks like the wsdisplay driver was not conigured correctly. Anybody
can tell me the possible reason that will result in ioctl calling failed? Or
I
need to change my kernel configuration?
Thanks,

--
Jiang

>
> Before hpcSetDisplayMode,  open(device) returned -1 ! That's the problem.
> The device is /dev/ttyE0. Why I can't open it? I have already chmod 666
> on it.
> I am using a NFS file system , while /dev seems to be a mfs file system.
> Does this matter? With df command, I can see the file system as following:
> Filesystem 1K-blocks  Used   Avail   Capacity  Mounted on
> pc.local:/***   4906270  2957880 1703076  63%          /
> mfs:10           44          39         2            95%          /dev
> Also, when OS boots up, it shows following lines:
>       ..........
>     ?init: Creating mfs /dev?(****, 896 nodes)
>       ..........
> Then when I try "startx", it says
>   /dev: write failed, file system is full
> So what's the problem?
>
> thanks very much!
>
> --
> Jiang
>
>
>